function scroll(n){
var blanc = "                                                                                                                      ";		
var texte = document.authform.bandeau.value;  
var scrolling_text = blanc + texte;	
	scrolling_text = scrolling_text.substring(n,scrolling_text.length);
	document.authform.scroll_text.value = scrolling_text;
	if(scrolling_text.length > 0){
		n++;
	}else{
		n = 0;
	}
	s = n;
	n = setTimeout("scroll(s)", 100);
}